问题标题：
【everymeans_stoptheairfrombeingpollutedinthatsmalltownaareusedtoeverymeans_stoptheairfrombeingpollutedinthatsmalltownaaareusdetobisusedtocgetusedtodusedto】
问题描述：
everymeans_stoptheairfrombeingpollutedinthatsmalltownaareusedto
everymeans_stoptheairfrombeingpollutedinthatsmalltowna
aareusdetobisusedtocgetusedtodusedto
邵丹回答：
b
every后跟单数名词,因此means在此不要把它当成复数,其意思为“方法”,是个单复数同形的名词；
“被动与做某事”beusedtodosth
句意：每种方法都被用阻止空气被污染
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